000
AXPZ20 KNHC 240935
TWDEP 

TROPICAL WEATHER DISCUSSION    
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
1005 UTC SUN JUN 24 2007

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0900 UTC.

...TROPICAL WAVES...

TROPICAL WAVE ALONG 97N N OF 4N TO THE COAST OF S MEXICO IS 
MOVING W 10-15 KT. BROAD MID LEVEL CURVATURE IS OBSERVED ON 
SATELLITE IMAGERY JUST N OF THE ITCZ. CLUSTERS OF SCATTERED 
MODERATE/STRONG CONVECTION ARE WITHIN THE ITCZ FROM 7N-11N 
BETWEEN 92W-99W. 

TROPICAL WAVE ALONG 108W FROM 3N TO 17N IS MOVING W 10-15 KT. 
BROAD MID LEVEL ROTATION IS OBSERVED ON SATELLITE IMAGERY WITHIN 
200 NM ALONG THE WAVE AXIS CENTERED NEAR THE ITCZ. CLUSTERS OF 
SCATTERED MODERATE CONVECTION ARE FROM 7N-13N BETWEEN 108W-112W. 

TROPICAL WAVE ALONG 125W/126W FROM 3N TO 14N IS MOVING W 10-15 
KT. MID LEVEL ROTATION IS OBSERVED ON SATELLITE IMAGERY JUST TO 
THE E OF THE WAVE AXIS NEAR 12N123.5W. SCATTERED MODERATE/ 
ISOLATED STRONG CONVECTION IS WITHIN 45 NM OF 13N FROM 
120W-124W. CLUSTERS OF SCATTERED MODERATE CONVECTION ARE FROM 
7N-11N BETWEEN 121W-126W. 

..ITCZ...

ITCZ AXIS IS CENTERED ALONG 9N83W 8N91W 9N100W 8N116W 7N129W 
8N140W. IN ADDITION TO CONVECTION ASSOCIATED WITH TROPICAL 
WAVES...SCATTERED MODERATE/STRONG CONVECTION WITHIN 60/75 NM OF 
100W FROM 10N TO 14N AND WITHIN 60 NM ALONG COAST OF GUATEMALA 
AND MEXICO BETWEEN 90W AND 91W. CLUSTERS OF SCATTERED 
MODERATE/ISOLATED STRONG CONVECTION ARE WITHIN 120 NM OF THE 
ITCZ AXIS FROM 80W-90W.   

...DISCUSSION...

E OF 120W...
MID/UPPER TROUGH EXTENDS FROM SW TEXAS SW ACROSS NW MEXICO TO A 
WEAK MID/UPPER LEVEL LOW 18N118W. DIVERGENCE TO THE SE OF THE 
TROUGH IS AIDING ITCZ CONVECTION ASSOCIATED WITH THE TROPICAL 
WAVE ALONG 108W. NEAR STATIONARY UPPER LEVEL HIGH REMAINS 
CENTERED OVER SW MEXICO NEAR 19N103W WITH A RIDGE EXTENDING SW 
TO 14N110W. UPPER LEVEL HIGH LOCATED OVER THE FAR SW CARIBBEAN 
EXTENDS A RIDGE W INTO THE E PACIFIC REGION TO NEAR 14N99W. 
THE UPPER FLOW IS LIGHT TO MODERATE OVER THE PACIFIC S OF THIS 
RIDGE. DIVERGENCE DUE TO THE UPPER RIDGE IS ENHANCING CONVECTION 
ALONG THE ITCZ ALONG 100W AS WELL AS CONVECTION OVER MUCH OF 
CENTRAL AMERICA AND S MEXICO. 

W OF 120W...
NEAR STATIONARY MID/UPPER LEVEL HIGH NEAR 21N127W WITH A RIDGE 
AXIS EXTENDING NE TO BEYOND 32N118W AND SW OUT OF THE REGION 
NEAR 13N140W. STRONG SUBSIDENCE AND ASSOCIATED DRY STABLE 
DOMINATE THIS AREA WITHIN 250 NM OF THE RIDGE AXIS THUS LIMITING 
CLOUDS AND SHOWERS IN THE AREA. 

AT THE SURFACE...
BROAD SURFACE RIDGE EXTENDS FROM A 1030 MB HIGH WELL NW OF THE 
REGION THROUGH 32N137W TO 20N122W. BROKEN/OVERCAST STRATOCUMULUS 
CLOUDS MOVING SW COVER MUCH OF THE AREA W OF 110W. DIFFERENCE IN 
PRESSURE BETWEEN THE BROAD RIDGE OVER THE E PACIFIC AND THE 
LOWER PRESSURES OVER THE SW U.S. ARE CREATING A TIGHT GRADIENT 
OVER THE NE PORTION TO ALLOW FOR N FLOW OF 20 KT WITH SEAS IN 
THE 8-10 FT RANGE IN N SWELL THROUGH THE NEXT 48 HRS. 

$$
WALLACE